Pioneer TS-A2000LD2 - 8-inch Shallow-Mount Subwoofer with 700 Watts Max. Power - Walmart.com
Amazon.com: Alphasonik AS8DF 8 inch 600 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure : Electronics
Kenwood KFC-XW800F 8" Shallow Subwoofer, 600W Max Power - Creative Audio
Alphasonik AS8DF 8 inch 600 Watts 4-Ohm Down Fire Shallow Mount Flat E | Alphasonik